package com.imooc.security.browser;

import com.imooc.security.browser.support.SimpleResponse;
import com.imooc.security.core.properties.SecurityProperties;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.security.web.DefaultRedirectStrategy;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.savedrequest.HttpSessionRequestCache;
import org.springframework.security.web.savedrequest.RequestCache;
import org.springframework.security.web.savedrequest.SavedRequest;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author Zqm
 * @Title: BrowserSecurityController
 * @ProjectName imooc-security
 * @date 2018/12/19
 */
@RestController
public class BrowserSecurityController {

    private Logger logger= LoggerFactory.getLogger(getClass());

    private RequestCache requestCache=new HttpSessionRequestCache();

    private RedirectStrategy redirectStrategy=new DefaultRedirectStrategy();

    @Autowired
    private SecurityProperties securityProperties;


    /**
     * 当需要身份认证时跳转到这
     * 判断是rest 还是网页
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("/authentication/require")
    @ResponseStatus(code = HttpStatus.UNAUTHORIZED)
    public SimpleResponse requireAuthentication(HttpServletRequest request,
                                        HttpServletResponse response) throws IOException {
        //从session中拿到当前的请求
        SavedRequest savedRequest=requestCache.getRequest(request,response);

        if (savedRequest!=null){
            String targetUrl = savedRequest.getRedirectUrl();
            logger.info("引发跳转的url是："+targetUrl);
            if (StringUtils.endsWithIgnoreCase(targetUrl,".html")){
                redirectStrategy.sendRedirect(request,response,securityProperties.getBrowserProperties().getLoginPage());
            }
        }

        return new SimpleResponse("访问的服务器需要身份认证，请引导用户到登录页");

    }
}
